Cleaned up IRIX audio driver, added float32 support and fallbacks when  a specific audiospec isn't supported or the hardware fails.
Cleaned up IRIX audio driver, added float32 support and fallbacks when
 a specific audiospec isn't supported or the hardware fails.

Usual disclaimer: No IRIX box, so this may not even compile.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%402049

cebash/SDL_PSL1GHT,cebash/SDL_PSL1GHT,cebash/SDL_PSL1GHT,aduros/SDL,aduros/SDL,cebash/SDL_PSL1GHT,aduros/SDL,aduros/SDL,cebash/SDL_PSL1GHT,aduros/SDL